Britney: A Pop Star With The Blues

As promised, here's our video of Britney Spears riding around looking distraught yesterday afternoon.

The pop princess pepped up on several occasions, particularly when we saw her talking to someone on her red phone.

Watch how quickly Britney's expression changes when she thinks she's slipped out of sight of our cameras, though!

Poor Brit - looks like she could really use a pick-me-up!